/Engine/Source/Editor/Sequencer/Public/SequencerChannelInterface.h
Extended base interface for channel types that specify extended editor data (ie,TMovieSceneChannelTraits<>::ExtendedEditorDataTypeis not void)
template<typename ChannelType> struct TSequencerChannelInterfaceBase< ChannelType, true > : public [TSequencerChannelInterfaceCommon< ChannelType >](API\Editor\Sequencer\TSequencerChannelInterfaceCommon)